A coupe of thoughts on the comment <<that internet itself promotes anonymity>> that might have been the case in the early days, but as more of our 'real lives' activity migrates online and replaces the physical world; internet has become the 'repository' of knowledge, but also goods and services, it's increasingly the place where 'untangle assets' get traded and human interactions take place (social/professional/commercial/financial/legal…). As we create our online trail, so is our personal profile. It's just a matter of time before we access everything about anyone with a simple email address (Google already pulls chunks of info from linkedin twitter, quora, etc to feed your G+ ID … and so does rapportive on email) It's already possible to spot the fake (ID) from the real.  

More and more you see these "vetting" mechanisms use cross pollination of personal data  (i.e. signing up to Airbnb to book room with your Facebook account or google account). As far as anonymity is concerned I think we're beyond the 'point of no return'.  This if from a North American perspective of course, but Europe will soon join us with different levels of implementation (the trade off is always Access vs Privacy and that's a though sell), and so will the rest of the planet. This sounds a bit Orwellian and a bit depressing I agree, and that's why it is SO VERY important to get Wikipedia and sister projects to thrive and grow and be a strong space, repository of human knowledge, human history, representing all voices.